Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds meaningful behavioral detail: it returns classified buy-box winners, and if an authorized_seller_set is saved it instead flags unauthorized sellers. This goes beyond the structured fields and clarifies the two operational modes.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences with the core function front-loaded and the conditional behavior and usage examples following efficiently. The list of example queries is somewhat long but directly useful for an agent matching user intent.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description provides strong purpose, usage, and conditional behavior context, but with 17 parameters, 35% schema coverage, and no output schema it is not fully complete. An agent could select and invoke it correctly for the main use case, but optional filters and return shape remain underspecified.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is only 35%, and the description does not compensate by explaining the many filter parameters such as limit, date ranges, price bounds, asins_touched, or buybox_days. It only touches the brand and authorized-sellers concept, leaving most of the 17 parameters underdocumented.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb and resource: 'List the sellers winning a brand's buy box' and explains the classification categories. It also distinguishes the tool's behavior from related sibling tools like authorized_seller_list by describing the conditional 'UNAUTHORIZED sellers' mode.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides explicit usage triggers with example user phrasings such as 'unauthorized sellers on Nike' and 'find rogue sellers', and closes with 'any brand buy-box / protection question'. It does not explicitly name sibling alternatives or state when not to use the tool, but the context is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.